Dave Anderson wrote on 2015/08/03 13:32 -0400:
----- Original Message ---------- Original Message -----Hi all, I updated my kernel to 4.2-rc4 but suddenly crash failed to analyse the kernel with the following error message: ------ crash: invalid kernel virtual address: 170000001d type: "possible" WARNING: cannot read cpu_possible_map crash: invalid kernel virtual address: 3800000046 type: "present" WARNING: cannot read cpu_present_map crash: invalid kernel virtual address: 240000002d type: "online" WARNING: cannot read cpu_online_map crash: invalid kernel virtual address: 570000006e type: "active" WARNING: cannot read cpu_active_map crash: cannot determine base kernel version crash: /home/adam/linux-btrfs/vmlinux and vmcore do not match! ------ Crash 7.1.0 and 7.1.2 fails with the same error. Previously I'm testing 4.2-rc1 kernel and 7.1.0 works like a charm. So is there something wrong with the new kernel? Thanks, QuThe most recent kernel version I've tested is Fedora's 4.2.0-0.rc4.git1.1.fc23.x86_64, although I'm not sure how that version correlates with upstream 4.2-rc1. It is based upon linux-4.1.tar.xz with a bunch of patches.FYI, the changelog of the Fedora kernel-4.2.0-0.rc4.git1.1.fc23 package indicates that it is based upon Linux v4.2-rc4. Dave
Hi Dave, Thanks for the reply. Although I didn't use stock fedora/RHEL kernel, I compiled one by myself. Maybe some fedora patches changed the behavior? I've attached the config file. Although I'm not sure if config is related to this problem.
Here is a live system session with the Fedora version of crash: # crash crash 7.1.2-1.fc23 Copyright (C) 2002-2014 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. GNU gdb (GDB) 7.6 Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-unknown-linux-gnu"... KERNEL: /usr/lib/debug/lib/modules/4.2.0-0.rc4.git1.1.fc23.x86_64/vmlinux DUMPFILE: /dev/crash CPUS: 160 DATE: Mon Aug 3 13:00:49 2015 UPTIME: 03:58:44 LOAD AVERAGE: 0.59, 0.36, 0.17 TASKS: 1714 NODENAME: hp-dl980g7-02.rhts.eng.bos.redhat.com RELEASE: 4.2.0-0.rc4.git1.1.fc23.x86_64 VERSION: #1 SMP Tue Jul 28 20:21:39 UTC 2015 MACHINE: x86_64 (2261 Mhz) MEMORY: 1006 GB PID: 38013 COMMAND: "crash" TASK: ffff881f668e6400 [THREAD_INFO: ffff881f68ad0000] CPU: 61 STATE: TASK_RUNNING (ACTIVE) crash> Can you run on the live system? If so, it's most likely an issue with the vmcore. Post the output of "crash -d8 vmlinux vmcore". The debug output may yield some clues.
Output attached too. Thanks, Qu
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